Further decides that the measures imposed by paragraph 6 of resolution 1521 (2003) shall be renewed for an additional six (6) months with a review by the Council after four (4) months, to allow the Government of Liberia sufficient time to establish an effective Certificate of Origin regime for trade in Liberian rough diamonds that is transparent and internationally verifiable, with a view to joining the Kimberley Process, and calls upon the Government of Liberia to provide the Sanctions Committee, established according to paragraph 21 of resolution 1521 (2003) with a detailed description of the proposed regime;